Ball Joints
#3
#4
There's actually 5 on a D1. Two each on the track rod and drag link, and one at the upper A-Arm mount in the rear, though that's a different type, but should still be inspected periodically.
The ones DAP sells are usually greasable.
If the ones you get have nyloc nuts, before you install them find a plain nut that's the same thread. Use the plain nut to tighten them up, then remove it and install the nyloc. Otherwise the nyloc will just cause the taper to spin and you can't get them tight.
If they are castellated nuts then you can skip the above.
The ones DAP sells are usually greasable.
If the ones you get have nyloc nuts, before you install them find a plain nut that's the same thread. Use the plain nut to tighten them up, then remove it and install the nyloc. Otherwise the nyloc will just cause the taper to spin and you can't get them tight.
If they are castellated nuts then you can skip the above.
#7